#region License
/*
MIT License
Copyright ?003-2006 Tao Framework Team
http://www.taoframework.com
All rights reserved.

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.
*/
#endregion License

using System;
using System.Runtime;
using System.Runtime.InteropServices;
using System.Security;

namespace Dare.Utilities.Media
{
    /// <summary>
    /// 
    /// </summary>
    public static partial class FFmpeg
    {
        #region Private Constants
        #region string AVUTIL_NATIVE_LIBRARY
        /// <summary>
        ///     Specifies AVUTIL's native library archive.
        /// </summary>
        /// <remarks>
        ///     Specifies avutil.dll everywhere; will be mapped via .config for mono.
        /// </remarks>
        //private const string AVUTIL_NATIVE_LIBRARY = "avutil-49.dll";
        private const string AVUTIL_NATIVE_LIBRARY = "avutil.dll";
        #endregion string AVUTIL_NATIVE_LIBRARY

        #endregion Private Constants
        /// <summary>
        /// 
        /// </summary>
        /// <param name="opaque"></param>
        /// <param name="buf"></param>
        /// <param name="buf_size"></param>
        /// <returns></returns>
        public delegate int Read_PacketCallback(IntPtr opaque, IntPtr buf, int buf_size);

        /// <summary>
        /// 
        /// </summary>
        /// <param name="opaque"></param>
        /// <param name="buf"></param>
        /// <param name="buf_size"></param>
        /// <returns></returns>
        public delegate int WritePacketCallback(IntPtr opaque, IntPtr buf, int buf_size);

        /// <summary>
        /// 
        /// </summary>
        /// <param name="opaque"></param>
        /// <param name="offset"></param>
        /// <param name="whence"></param>
        /// <returns></returns>
        public delegate Int64 SeekCallback(IntPtr opaque, Int64 offset, int whence);

        /// <summary>
        /// 
        /// </summary>
        /// <param name="checksum"></param>
        /// <param name="buf"></param>
        /// <param name="size"></param>
        /// <returns></returns>
        [CLSCompliant(false)]
        public delegate UInt32 UpdateChecksumCallback(UInt32 checksum, IntPtr buf, UInt32 size);

        /// <summary>
        /// 
        /// </summary>
        public enum PixelFormat
        {
            /// <summary>
            /// 
            /// </summary>
            PIX_FMT_NONE = -1,
            /// <summary>
            /// 
            /// </summary>
            PIX_FMT_YUV420P, // Planar YUV 4:2:0, 12bpp, (1 Cr & Cb sample per 2x2 Y samples)
            /// <summary>
            /// 
            /// </summary>
            PIX_FMT_YUYV422, // Packed YUV 4:2:2, 16bpp, Y0 Cb Y1 Cr
            /// <summary>
            /// 
            /// </summary>
            PIX_FMT_RGB24, // Packed RGB 8:8:8, 24bpp, RGBRGB...
            /// <summary>
            /// 
            /// </summary>
            PIX_FMT_BGR24, // Packed RGB 8:8:8, 24bpp, BGRBGR...
            /// <summary>
            /// 
            /// </summary>
            PIX_FMT_YUV422P, // Planar YUV 4:2:2, 16bpp, (1 Cr & Cb sample per 2x1 Y samples)
            /// <summary>
            /// 
            /// </summary>
            PIX_FMT_YUV444P, // Planar YUV 4:4:4, 24bpp, (1 Cr & Cb sample per 1x1 Y samples)
            /// <summary>
            /// 
            /// </summary>
            PIX_FMT_RGB32, // Packed RGB 8:8:8, 32bpp, (msb)8A 8R 8G 8B(lsb), in cpu endianness
            /// <summary>
            /// 
            /// </summary>
            PIX_FMT_YUV410P, // Planar YUV 4:1:0, 9bpp, (1 Cr & Cb sample per 4x4 Y samples)
            /// <summary>
            /// 
            /// </summary>
            PIX_FMT_YUV411P, // Planar YUV 4:1:1, 12bpp, (1 Cr & Cb sample per 4x1 Y samples)
            /// <summary>
            /// 
            /// </summary>
            PIX_FMT_RGB565, // Packed RGB 5:6:5, 16bpp, (msb) 5R 6G 5B(lsb), in cpu endianness
            /// <summary>
            /// 
            /// </summary>
            PIX_FMT_RGB555, // Packed RGB 5:5:5, 16bpp, (msb)1A 5R 5G 5B(lsb), in cpu endianness most significant bit to 1
            /// <summary>
            /// 
            /// </summary>
            PIX_FMT_GRAY8, // Y , 8bpp
            /// <summary>
            /// 
            /// </summary>
            PIX_FMT_MONOWHITE, // Y , 1bpp, 1 is white
            /// <summary>
            /// 
            /// </summary>
            PIX_FMT_MONOBLACK, // Y , 1bpp, 0 is black
            /// <summary>
            /// 
            /// </summary>
            PIX_FMT_PAL8, // 8 bit with PIX_FMT_RGB32 palette
            /// <summary>
            /// 
            /// </summary>
            PIX_FMT_YUVJ420P, // Planar YUV 4:2:0, 12bpp, full scale (jpeg)
            /// <summary>
            /// 
            /// </summary>
            PIX_FMT_YUVJ422P, // Planar YUV 4:2:2, 16bpp, full scale (jpeg)
            /// <summary>
            /// 
            /// </summary>
            PIX_FMT_YUVJ444P, // Planar YUV 4:4:4, 24bpp, full scale (jpeg)
            /// <summary>
            /// 
            /// </summary>
            PIX_FMT_XVMC_MPEG2_MC,// XVideo Motion Acceleration via common packet passing(xvmc_render.h)
            /// <summary>
            /// 
            /// </summary>
            PIX_FMT_XVMC_MPEG2_IDCT,
            /// <summary>
            /// 
            /// </summary>
            PIX_FMT_UYVY422, // Packed YUV 4:2:2, 16bpp, Cb Y0 Cr Y1
            /// <summary>
            /// 
            /// </summary>
            PIX_FMT_UYYVYY411, // Packed YUV 4:1:1, 12bpp, Cb Y0 Y1 Cr Y2 Y3
            /// <summary>
            /// 
            /// </summary>
            PIX_FMT_BGR32, // Packed RGB 8:8:8, 32bpp, (msb)8A 8B 8G 8R(lsb), in cpu endianness
            /// <summary>
            /// 
            /// </summary>
            PIX_FMT_BGR565, // Packed RGB 5:6:5, 16bpp, (msb) 5B 6G 5R(lsb), in cpu endianness
            /// <summary>
            /// 
            /// </summary>
            PIX_FMT_BGR555, // Packed RGB 5:5:5, 16bpp, (msb)1A 5B 5G 5R(lsb), in cpu endianness most significant bit to 1
            /// <summary>
            /// 
            /// </summary>
            PIX_FMT_BGR8, // Packed RGB 3:3:2, 8bpp, (msb)2B 3G 3R(lsb)
            /// <summary>
            /// 
            /// </summary>
            PIX_FMT_BGR4, // Packed RGB 1:2:1, 4bpp, (msb)1B 2G 1R(lsb)
            /// <summary>
            /// 
            /// </summary>
            PIX_FMT_BGR4_BYTE, // Packed RGB 1:2:1, 8bpp, (msb)1B 2G 1R(lsb)
            /// <summary>
            /// 
            /// </summary>
            PIX_FMT_RGB8, // Packed RGB 3:3:2, 8bpp, (msb)2R 3G 3B(lsb)
            /// <summary>
            /// 
            /// </summary>
            PIX_FMT_RGB4, // Packed RGB 1:2:1, 4bpp, (msb)2R 3G 3B(lsb)
            /// <summary>
            /// 
            /// </summary>
            PIX_FMT_RGB4_BYTE, // Packed RGB 1:2:1, 8bpp, (msb)2R 3G 3B(lsb)
            /// <summary>
            /// 
            /// </summary>
            PIX_FMT_NV12, // Planar YUV 4:2:0, 12bpp, 1 plane for Y and 1 for UV
            /// <summary>
            /// 
            /// </summary>
            PIX_FMT_NV21, // as above, but U and V bytes are swapped

            /// <summary>
            /// 
            /// </summary>
            PIX_FMT_RGB32_1, // Packed RGB 8:8:8, 32bpp, (msb)8R 8G 8B 8A(lsb), in cpu endianness
            /// <summary>
            /// 
            /// </summary>
            PIX_FMT_BGR32_1, // Packed RGB 8:8:8, 32bpp, (msb)8B 8G 8R 8A(lsb), in cpu endianness

            /// <summary>
            /// 
            /// </summary>
            PIX_FMT_NB, // number of pixel
        };

        /// <summary>
        /// 
        /// </summary>
        [StructLayout(LayoutKind.Sequential)]
        public struct ByteIOContext
        {
            IntPtr buffer;

            [MarshalAs(UnmanagedType.I4)]
            int buffer_size;

            IntPtr buf_ptr;

            IntPtr buf_end;

            //[MarshalAs(UnmanagedType.FunctionPtr)]
            //AnonymousCallback opaque;
            IntPtr opaque;

            [MarshalAs(UnmanagedType.FunctionPtr)]
            Read_PacketCallback read_packet;

            [MarshalAs(UnmanagedType.FunctionPtr)]
            WritePacketCallback write_packet;

            [MarshalAs(UnmanagedType.FunctionPtr)]
            SeekCallback seek;

            [MarshalAs(UnmanagedType.I8)]
            Int64 pos; // position in the file of the current buffer

            [MarshalAs(UnmanagedType.I4)]
            int must_flush; // true if the next seek should flush

            [MarshalAs(UnmanagedType.I4)]
            int eof_reached; // true if eof reached

            [MarshalAs(UnmanagedType.I4)]
            int write_flag; // true if open for writing

            [MarshalAs(UnmanagedType.I4)]
            int is_streamed;

            [MarshalAs(UnmanagedType.I4)]
            int max_packet_size;

            [MarshalAs(UnmanagedType.U4)]
            uint checksum;

            IntPtr checksum_ptr;

            [MarshalAs(UnmanagedType.FunctionPtr)]
            UpdateChecksumCallback update_checksum;

            [MarshalAs(UnmanagedType.I4)]
            int error; // contains the error code or 0 if no error happened
        };

        /// <summary>
        /// 
        /// </summary>
        /// <returns></returns>
        public delegate String ItemNameCallback();

        /// <summary>
        /// 
        /// </summary>
        [StructLayout(LayoutKind.Sequential)]
        public struct AVClass
        {
            [MarshalAs(UnmanagedType.LPStr)]
            String class_name;
            ItemNameCallback item_name;
            IntPtr pAVOption;
        };

        /// <summary>
        /// 
        /// </summary>
        public struct AVOption
        {
        };

        /// <summary>
        /// 
        /// </summary>
        [StructLayout(LayoutKind.Sequential)]
        public struct AVRational
        {
            /// <summary>
            /// 
            /// </summary>
            [MarshalAs(UnmanagedType.I4)]
            public int num;
            /// <summary>
            /// 
            /// </summary>
            [MarshalAs(UnmanagedType.I4)]
            public int den;
        };
    }
}
